[PHPdev]

First I guess I should say that I am working in 3.5.4 doing an upgrade from 3.4.11.

I am editing the registration form. Not much more than rearraging the form elements, and the section headers. Looking at how the registration form has now been broken up into several different templates, I see that under the "register_billing_address" template file there is a section at the top that starts with the if statement "if $action eq cart", and thus changes the templates output based on the if.

Does anyone know where this $action is set, and when it would be set to "cart" for the registration page?

Thank You